Question

Which one of the following modes of transmission requires the devices to be in a direct line of sight with each other?

i. Wi-Fi ii. Bluetooth iii. Infrared​

Answer 1

Answer:infra-red

Explanation:

It is a kind of light so it moves in straight line while other two are in wave form . So, infra-red required the transmission in straight line.

Answer 2

Which one of the following modes of transmission requires the devices to be in a direct line of sight with each other?

i. Wi-Fi ii. Bluetooth iii. Infrared​

The Correct Option is...

✔ iii. Infrared​

Explanation ⦂

Infrared technology is one such technology, which is done using LED or laser. Infrared technology, which is controlled by remote control, requires a short, straight and unobstructed path between the remote and the device. Infrared technology thus requires the remote and associated equipment to be in a straight line. If any other equipment or any other obstruction occurs on this path, the signals are blocked and this technology does not work.

Therefore, in infrared technology, both the instruments must be in a straight line.

In WiFi technology and Bluetooth technology, the devices do not need to be face to face on a straight path in any direction. In both these techniques, there must be a maximum range limit between the devices.

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